4.51 billion years ago · approximate date
The Moon is born
A world the size of Mars strikes Earth and the debris becomes the Moon.
The leading explanation for the Moon is a giant impact within Earth's first hundred million years. A body roughly the size of Mars collided with the young planet, and the ejected material settled into orbit and drew together as the Moon.
- Period
- Hadean
- Earth's history already passed
- 0.6608 percent
- 4.54 kilometres
- 4.51 kilometres from the end
- One day
- 00:09:30
- One year
- January 3, 09:53
Source: NASA Moon